Question : 71.              When copper metal placed in a solution of platinum(II) : 1335431

71.              When copper metal is placed in a solution of platinum(II) chloride, will a reaction occur?  If so, what is the balanced equation for the reaction?

A)Yes.  Cu(s) + PtCl2(aq) ? CuCl(aq) + PtCl(aq)

B)Yes.  Cu(s) + Pt2Cl(aq) ? CuCl(aq) + Pt(aq)

C)Yes.  Cu(s) + PtCl2(aq) ? CuCl2(aq) + Pt(s)

D)No reaction will occur.

E)Cu(s) + Pt2Cl(aq) ? CuCl(aq) + 2Pt(aq)

72.              When aqueous solutions of sodium chloride and silver nitrate are mixed, a double-displacement reaction occurs.  What is the balanced equation for the reaction?

A)NaCl(aq) + AgNO3(aq) ? Na(s) + AgNO3Cl(aq)

B)NaCl(aq) + AgNO3(aq) ? NaNO3(aq) + AgCl(aq)

C)NaCl(aq) + AgNO3(aq) ? NaNO3(aq) + AgCl(s)

D)NaCl(aq) + AgNO3(aq) ? NaNO3(aq) + ClAg(s)

E)NaCl(aq) + AgNO3(aq) ? NaNO3(aq) + 3AgCl(s)

73.              When aqueous solutions of potassium chloride and lead(II) nitrate are mixed, a double-displacement reaction occurs.  What is the balanced equation for the reaction?

A)KCl(aq) + Pb(NO3)2(aq) ? K(s) + PbNO3Cl(aq)

B)KCl(aq) + Pb2NO3(aq) ? KNO3(aq) + PbCl(aq)

C)KCl(aq) + Pb2NO3(aq) ? KNO3(aq) + 2PbCl(s)

D)2KCl(aq) + Pb(NO3)2(aq) ? KNO3(aq) + ClPb(s)

E)2KCl(aq) + Pb(NO3)2(aq) ? 2KNO3(aq) + PbCl2(s)

74.              If solutions of potassium carbonate and calcium nitrate are mixed, will a double-displacement reaction occur?  If so, what is the balanced equation for the reaction?

A)No reaction will occur.

B)Yes.  K2CO3(aq) + Ca(NO3)2(aq) ? KNO3(aq) + CaK(s)

C)Yes.  K2CO3(aq) + Ca(NO3)2(aq) ? KNO3(aq) + CaCO3(s)

D)Yes.  K2CO3(aq) + Ca(NO3)2(aq) ? 2KNO3(aq) + CaCO3(s)

E)Yes.  K2CO3(aq) + Ca(NO3)2(aq) ? K2(NO3)2(aq) + CaCO3(s)

75.              If solutions of potassium chromate and calcium nitrate are mixed, will a double-displacement reaction occur?  If so, what is the balanced equation for the reaction?

A)No reaction will occur.

B)Yes.  K2CrO4(aq) + Ca(NO3)2(aq) ? KNO3(aq) + CaK(s)

C)Yes.  K2CrO4(aq) + Ca(NO3)2(aq) ? KNO3(aq) + CaCrO4(s)

D)Yes.  K2CrO4(aq) + Ca(NO3)2(aq) ? 2KNO3(aq) + CaCrO4(s)

E)Yes.  K2CrO4(aq) + Ca(NO3)2(aq) ? K2(NO3)2(aq) + CaCrO4(s)

76.              Which of the following ionic compounds would be expected to be insoluble in water?

A)  NaCl    B)  KOH    C)  AgI    D)  Li2SO4    E)  Ca(CH3CO2)2

77.              Which of the following ionic compounds would be expected to be insoluble in water?

A)  KCl    B)  PbI2    C)  NH4NO3    D)  CuSO4    E)  NaCH3CO2

78.              Which of the following ionic compounds would be expected to be insoluble in water?

A)  CaS    B)  Ca(NO3)2    C)  Na2SO4    D)  KI    E)  NaOH

79.              Consider the reaction CaCO3(s) + 2HCl(aq) ? CaCl2(aq) + CO2(g) + H2O(l).  The driving force that causes the reaction to go to completion is:

A)formation of a precipitate.D)none of  these.

B)formation of an insoluble gas.E)formation of an element.

C)formation of a soluble salt.

80.              Consider the reaction Ca(OH)2(aq) + 2HCl(aq) ? CaCl2(aq) + 2H2O(l).  The driving force that causes the reaction to go to completion is:

A)formation of a precipitate.D)formation of water.

B)formation of an insoluble gas.E)formation of an element.

C)formation of a soluble salt.